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PRB Bundling Extension

a physical resource block and extension technology, applied in the field of wireless communications, to achieve the effect of improving the robustness and performance of downlink transmission and improving the robustness and performance of uplink transmission

Active Publication Date: 2021-07-22
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a method for improving the quality and performance of wireless networks by allowing a device to flexibly switch between using the same precoder or changing the precoder across slots in the multi-slot scheduling or slot aggregation. This helps increase the robustness and performance of both the downlink and uplink transmissions, depending on the network conditions.

Problems solved by technology

A particular problem in NR is how to perform channel estimation when a UE is scheduled in multiple slots by using slot aggregation or multi-slot scheduling (i.e., the UE knows it will receive data in multiple slots and can thus utilize this) and at the same time achieve spatial diversity gain.

Method used

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Examples

Experimental program
Comparison scheme
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case 1

[0155]Below describes PRB bundling for Rel.15 downlink NR. Note that the time domain may be taken into account in the PRB bundling definition because NR will support multi-slot scheduling, including transport block (TB) repetition bundling size may include (including possible down-selection):[0156] value(s) based on RBG[0157]RBG / k, where k is integer[0158]m×RBG, where m is integer, In some cases, m may always be equal to 1[0159]Case 2: other values based on bandwidth part, and / or scheduled bandwidth and / or UE capability etc.[0160]Consecutive scheduled bandwidth[0161]Values equal or larger than scheduled bandwidth (BW)

[0162]The use case for 1 RB (12 subcarriers) bundling size would be either RA type 0 with RBG size equal to 1, or RA type 1 to allow for very fast changing precoder cycling per RB. An alternative would be to use Case 2 where the precoder cycling change from RB to RB or from subcarrier to subcarrier has to be very slow. Hence Case 2 is better tailored for larger scheduli...

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Abstract

According to certain embodiments, a transmitting node for transmitting data to a receiving node is provided. The transmitting node is operable at least in a dynamic bundling size mode and includes a communication interface and processing circuitry. The processing circuitry is configured, when operating in the dynamic bundling size mode, to provide the receiving node with an indication of bundling control information representing at least a number L of slots. The processing circuitry transmits data in L consecutive slots using a constant first precoding setting and transmit data in subsequent L consecutive slots using a constant second precoding setting. The first and second precoding settings are independently assignable.

Description

TECHNICAL FIELD[0001]Particular embodiments are directed to wireless communications and, more particularly, to an extension of physical resource block (PRB) bundling.INTRODUCTION[0002]Third Generation Partnership Project (3GPP) long term evolution (LTE) and new radio (NR) include physical resource block (PRB) bundling. PRB bundling groups adjacent resource blocks (RB) together. The gNB may use the same transmission precoder across all RBs in the RB bundle (also known as a precoder resource block group (PRG)). The UE can use all the demodulation reference signals (DMRS) in the RB bundle when performing channel estimation, which improves performance. An example is illustrated in FIG. 1. More specifically, the fact that multiple DMRS from different RBs represent the same channel provides the channel estimation with more input data, which improves accuracy.[0003]FIG. 1 is a graph illustrating channel estimation error as a function of signal to noise ratio (SNR) for various bundle sizes....

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L5/00H04B7/0456H04W72/04H04L25/02
CPCH04L5/0023H04B7/0456H04L25/0204H04W72/0446H04W72/042H04L1/08H04L5/0044H04W72/23
Inventor FRENNE, MATTIASBALDEMAIR, ROBERTHESSLER, MARTIN
Owner TELEFON AB LM ERICSSON (PUBL)